Twin-nibbed marking pen

Details Twin-nibbed marking pen Twin-nibbed marking pen

1987-12-18

1991-01-08

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 36, D19 43, D19 51

Patent

active

D03136221

REFERENCES:
patent: D279992 (1985-08-01), Gribb
patent: D295537 (1988-05-01), Davidson et al.
patent: D295878 (1988-05-01), Lovell
patent: D300640 (1989-04-01), Colletta et al.
patent: 1495890 (1924-05-01), Day
patent: 3684389 (1972-08-01), Eron et al.
patent: 3765780 (1973-10-01), Guu et al.
patent: 4509875 (1985-04-01), Shintani
patent: 4557618 (1985-12-01), Iwata et al.
Visual Systems Co. Inc., Catalog .COPYRGT.1985 See page 125 top left, Berol double ended marker, Desk copy.

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